Structure and function relationship of OqxB efflux pump from Klebsiella pneumoniae.
Structure and function relationship of OqxB efflux pump from Klebsiella pneumoniae.
复制标题
DOI:
10.1038/s41467-021-25679-0
复制
发表时间:
2021-09-13
影响因子:
16.6
通讯作者:
Murakami S
中科院分区:
文献类型:
--
作者:
Bharatham N;Bhowmik P;Aoki M;Okada U;Sharma S;Yamashita E;Shanbhag AP;Rajagopal S;Thomas T;Sarma M;Narjari R;Nagaraj S;Ramachandran V;Katagihallimath N;Datta S;Murakami S
OqxB is an RND (Resistance-Nodulation-Division) efflux pump that has emerged as a factor contributing to the antibiotic resistance in Klebsiella pneumoniae. OqxB underwent horizontal gene transfer and is now seen in other Gram-negative bacterial pathogens including Escherichia coli, Enterobacter cloacae and Salmonella spp., further disseminating multi-drug resistance. In this study, we describe crystal structure of OqxB with n-dodecyl-β-D-maltoside (DDM) molecules bound in its substrate-binding pocket, at 1.85 Å resolution. We utilize this structure in computational studies to predict the key amino acids contributing to the efflux of fluoroquinolones by OqxB, distinct from analogous residues in related transporters AcrB and MexB. Finally, our complementation assays with mutated OqxB and minimum inhibitory concentration (MIC) experiments with clinical isolates of E. coli provide further evidence that the predicted structural features are indeed involved in ciprofloxacin efflux. OqxB is an RND (Resistance-Nodulation-Division) transporter that contributes to the antibiotic resistance in Klebsiella pneumoniae. Here, the authors report structural and functional characterization of OqxB, with insights into its substrate binding pocket and the role in fluoroquinolone resistance.
登录
查看更多内容
影响因子:
168.9
作者:
Holmes, Alison H.;Moore, Luke S. P.;Piddock, Laura J. V.
通讯作者:
Piddock, Laura J. V.
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
5.2
作者:
Ferreira, Roumayne L.;da Silva, Brenda C. M.;da Silva Pranchevicius, Maria-Cristina
通讯作者:
da Silva Pranchevicius, Maria-Cristina
影响因子:
5.4
作者:
Aron Z;Opperman TJ
通讯作者:
Opperman TJ
影响因子:
9.9
作者:
通讯作者:
--